Electrolysis treatment process and device for low-content organic pollutants in high-salinity rare earth wet smelting wastewater

A technology of organic pollutants and wet smelting, applied in metallurgical wastewater treatment, water pollutants, water/sewage multi-stage treatment, etc., can solve the problem of easy scaling and corrosion of evaporation equipment, high concentration of organic matter, great environmental hazards, etc. problems, to achieve the effect of thorough oxidation and degradation of organic matter, high treatment efficiency, and no interference from environmental factors

Inactive Publication Date: 2019-05-17
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the evaporation and crystallization method consumes a lot of heat, the treatment cost is high, and the evaporation equipment is easy to scale and corrode, and the investment cost is high, which is difficult for enterprises to accept. It is only suitable for the recovery and treatment of salty wast

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  • Electrolysis treatment process and device for low-content organic pollutants in high-salinity rare earth wet smelting wastewater
  • Electrolysis treatment process and device for low-content organic pollutants in high-salinity rare earth wet smelting wastewater
  • Electrolysis treatment process and device for low-content organic pollutants in high-salinity rare earth wet smelting wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0069] Taking the organic wastewater produced by the wet smelting extraction process of an ionic rare earth enterprise as the treatment object, the characteristics of the raw water quality of the wastewater are shown in Table 1 below. TDS is the salinity index. Generally, the TDS of tap water in Guangzhou is 60-100mg / L.

[0070] Table 1 Raw water quality of organic wastewater from rare earth hydrometallurgy (mg / L)

[0071] project

COD

pH

TDS

Cl -

Pb

Cr

Zn

raw water

2640.8

<0.7

77400

58338

44.4

21.7

4.8

[0072] An electrolytic treatment process for organic pollutants in high-salinity rare earth wet smelting wastewater, the specific treatment process steps are as follows:

[0073] 1) Start the water inlet pump at a distance of 1m 3 The / h flow rate will drive the organic wastewater of rare earth wet smelting into a volume of 3m 3 The grease trap is used to remove the upper oil slick through the oil s...

Embodiment 2

[0082] Taking the organic wastewater produced by the hydrometallurgy extraction process of an ionic rare earth enterprise as the treatment object, the raw water quality characteristics of the wastewater are shown in Table 3 below.

[0083] Table 3 Raw water quality of rare earth hydrometallurgy organic wastewater (mg / L)

[0084] project

COD

pH

TDS

Cl -

Pb

Cr

Zn

raw water

1986.7

<0.5

128500

92365

27.63

15.45

3.66

[0085] An electrolytic treatment process for organic pollutants in high-salinity rare earth wet smelting wastewater, the specific treatment process steps are as follows:

[0086] 1) Start the water inlet pump at a distance of 10m 3 / h flow rate Rare earth wet smelting organic wastewater into the volume of 30m 3 The oil trap, the upper layer of oil slick is removed by the oil scraper, and then the waste water enters the volume with a volume of 30m 3 The air flotation tank adopts the dissolv...

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Abstract

The invention discloses an electrolysis treatment process and device for low-content organic pollutants in high-salinity rare earth wet smelting wastewater. The electrolysis treatment process comprises the following main steps: (1) oil removal of the wastewater; (2) pH regulation and coagulating sedimentation for heavy metal removal of the wastewater; (3) chlorine peroxidation treatment of the wastewater; (4) electrolysis treatment of the wastewater; (5) reduction, flocculation and sedimentation of the wastewater; (6) activated carbon filtration treatment of the wastewater. According to the electrolysis treatment process and device, aiming at the refractory characteristic of organic matter in the high-salinity rare earth wet smelting wastewater, the organic matter is decomposed and mineralized under the electrolysis action and the strong oxidation action of produced chlorine, and up-to-standard discharge of the wastewater is realized.

Description

technical field [0001] The invention relates to an electrolytic treatment process for organic pollutants in wastewater, which belongs to the field of industrial wastewater treatment, and in particular to an electrolytic treatment process and device for organic pollutants in high-salinity rare earth wet smelting wastewater. Background technique [0002] my country is rich in rare earth resources. The world and China's rare earth resource reserves and basic reserves are 88 million tons (REO, the same below) and 150 million tons, 27 million tons and 89 million tons respectively, and their resource reserves and basic reserves rank first in the world. The main rare earth resources are Baiyun Obo mixed rare earth mine in Inner Mongolia, Maoniuping in Mianning, Sichuan, bastnaesite in Weishan, Shandong, and ion adsorption rare earth mine in South China. [0003] In 2005, the output of rare earth smelting and separation products in my country reached 103,900 tons, accounting for mor...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F101/20C02F101/30C02F103/16
Inventor 晏波陈涛李宁雷畅王明辉林翰志
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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